content: /*
   * Copyright 2017 David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package hu.akarnokd.reactive4javaflow.impl.operators;
  
  import hu.akarnokd.reactive4javaflow.*;
  import hu.akarnokd.reactive4javaflow.functionals.CheckedFunction;
  import org.junit.Test;
  
  import java.io.IOException;
  import java.util.*;
  
  public class FolyamWithLatestFromManyTest {
  
      CheckedFunction<? super Object[], Integer> sum = a -> {
          int sum = 0;
          for (Object o : a) {
              sum += (Integer)o;
          }
          return sum;
      };
  
      @Test
      public void standard() {
          TestHelper.assertResult(
                  Folyam.range(1, 5).withLatestFromMany(List.of(Folyam.just(10), Folyam.just(100), Folyam.just(1000)), sum)
                  , 1111, 1112, 1113, 1114, 1115
          );
      }
  
  
      @Test
      public void standardHidden() {
          TestHelper.assertResult(
                  Folyam.range(1, 5)
                          .hide()
                          .withLatestFromMany(List.of(Folyam.just(10), Folyam.just(100), Folyam.just(1000)), sum)
                  , 1111, 1112, 1113, 1114, 1115
          );
      }
  
      @Test
      public void standard2() {
          TestHelper.assertResult(
                  Folyam.range(1, 5).withLatestFromMany(List.of(Folyam.never()), sum)
          );
      }
  
      @Test
      public void standard2Hide() {
          TestHelper.assertResult(
                  Folyam.range(1, 5).hide().withLatestFromMany(List.of(Folyam.never()), sum)
          );
      }
  
      @Test
      public void standard3() {
          TestHelper.assertResult(
                  Folyam.range(1, 5).withLatestFromMany(List.of(Folyam.never(), Folyam.empty(), Folyam.never()), sum)
          );
      }
  
      @Test
      public void standard3HIde() {
          TestHelper.assertResult(
                  Folyam.range(1, 5).hide().withLatestFromMany(List.of(Folyam.empty()), sum)
          );
      }
  
      @Test
      public void mainError() {
          TestHelper.assertFailureComposed(-1,
                  f -> f.withLatestFromMany(List.of(Folyam.just(10)), sum),
                  IOException.class
          );
      }
  
      @Test
      public void otherError() {
          TestHelper.assertFailureComposed(5,
                  f -> f.withLatestFromMany(List.of(Folyam.<Integer>error(new IOException())), sum),
                  IOException.class
          );
      }
  
      @Test
      public void combinerCrash() {
          TestHelper.assertFailureComposed(5,
                  f -> f.withLatestFromMany(List.of(Folyam.just(10)), (a) -> { throw new IOException(); }),
          IOException.class);
      }
  
      @Test
      public void lotOfOthers() {
          List<Folyam<Integer>> list = new ArrayList<>();
          for (int i = 0; i < 10; i++) {
              list.add(Folyam.never());
          }
          list.add(null);
  
          Folyam.range(1, 5)
                  .withLatestFromMany(list, sum)
                  .test()
                  .assertFailure(NullPointerException.class);
      }
  }
  